USR IOT USR-M100 - MQTT Query;Control

User Manual
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Fig. 177 Write DO
Fig. 178 DO Values
10.4. MQTT query/control
When enable MQTT gateway or AWS IOT service, user need configure the MQTT broker parameters in MQTT Gateway tab or Cloud
service tab at first. Users can query or control IO ports by enabling IO control/query box on publish or subscribe tab. Note that the
query or response data is modbus RTU protocol.